Google has yet to officially announce the launch of its OS X 64-bit beta test, but the company has apparently put in the updated build in its Canary and Dev Channels. In theory, the browser should offer users with 64-bit Mac systems better performance along with more multi-tasking support. However, since it's still being tested, it may be a while before users will be able to get the full benefits of the improvements as Google updates the browser.

What do you think of Google allowing Mac 64-bit PC owners a chance to try out an early version of its Chrome 64-bit browser?

I just installed it - you can run the 64 bit Chrome Canary side by side with the current Chrome browser, so if it crashes you can revert back to the stable version. So far, content seems to load a bit faster, and there is no stuttering or any noticeable bugs.